Jumlah dan Selisih Sudut Trigonometri

No	Rumus
1	$\sin (A + B) = \sin A \cos B + \cos A \sin B$ $\sin (A - B) = \sin A \cos B - \cos A \sin B$
2	$\cos (A + B) = \cos A \cos B - \sin A \sin B$ $\cos (A - B) = \cos A \cos B + \sin A \sin B$
3	$\tan (A + B) = \frac{\tan A + \tan B}{1 - \tan A \tan B}$ $\tan (A - B) = \frac{\tan A - \tan B}{1 + \tan A \tan B}$